Troubleshooting - TOHATSU 40 Service Manual

Electrical Drawings
All electrical drawings shown in this manual have been simplified to
clarify the circuit that is being tested. They represent typical
configurations and may not look exactly like the electrical wiring for
your engine. Complete electrical schematics are provided in the
Outboard Motors Service Data publication.

TROUBLESHOOTING

The troubleshooting chart lists common engine symptoms related
to problems with the electrical system. It also indicates specific
malfunctions in the electrical system which may be causing a
problem so it can be isolated more effectively. Before beginning
major troubleshooting on the electrical system, perform the
following operations:
• Check battery fluid level and specific gravity. Charge or replace
as required. See Battery Care and Maintenance, this section.
• Check the following electrical connections and make sure they
are secure and free of corrosion:
- Battery cables
- Starter solenoid wiring
- Starter motor wiring (including ground connection)
- Spark plug leads
- Ignition circuit wiring
- Stop circuit wiring
- Charge circuit wiring
• Make sure shift lever or remote control lever operates freely.
• Attach lanyard to emergency stop switch, see Section 2.
3-/ 4-Cylinder
ELECTRICAL SYSTEM
7-11